Acquisition of a High-Resolution Powder X-ray Diffractometer for Research and Education

这笔拨款将为购买高分辨率x射线粉末衍射仪提供部分支持，用于多晶材料的定量结构分析、定量相分析和尺寸/应变分析。该仪器将用于获得精确和可重复的强度，高分辨率，高信噪比，以及可由化学家，材料科学家和化学工程师分析建模的峰值形状。将使用该设施的项目包括研究晶体结构和组成的变化如何影响固态无机材料（主要是复杂的氧化物、氮化物和硫化物材料）的电子结构。通过新方法合成的微孔材料的结构以及纳米晶沸石的尺寸分布将进行测定。对用于高温传感器的陶瓷中存在的相进行定量分析将提供有关传感机制的重要信息。由镧系金属和过渡金属与各种配体（包括硼烷）组成的新型无机配合物的结构将被确定。包括金属氧化物、金属硫化物、金属氮化物、负载金属和杂多化合物在内的非均相催化剂经历了与其催化性能相关的重要相变，将被研究。此外，还将分析合金中的应力以及纳米晶材料如何影响聚合物的性能。仪器将被安置在化学系的分析化学设备中。它将用于提供粉末衍射方法的全面培训和研究项目。这台设备将大大提高该机构的研究和教育能力

9975652DuttaThis grant will provide partial support for the acquisition of a high-resolution X-ray powder diffractometer for quantitative structural analysis of polycrystalline materials, quantitative phase analysis and size/strain analysis. The instrument will be used to obtain accurate and reproducible intensities, high resolution, high signal to noise, and peak shapes that can be analytically modeled by chemists, material scientists and chemical engineers. Examples of projects that will use the facility include examining how changes in crystal structure and composition influence the electronic structure of solid state inorganic materials, primarily complex oxide, nitride and sulfide materials. Determination of structures of microporous materials synthesized by novel routes as well as size distributions of nanocrystalline zeolites will be carried out. Quantitative analysis of phases present in ceramics used for high temperature sensors will provide important information on the sensing mechanisms. Structures of novel inorganic complexes composed of lathanide and transition metals with a variety of ligands, including boranes will be determined. Heterogeneous catalysts including metal oxides, metal sulfides, metal nitrides, supported metals and heteropoly compounds undergo important phase transformations relevant to their catalytic properties and will be studied. In addition, analysis of stresses in alloys and how nanocrystalline materials influence polymer properties will be examined.The instrument will be housed in the Analytical Chemistry facility of the Chemistry Department. It will be used to provide comprehensive training in powder diffraction methods and for research projects.%%%This equipment will significantly enhance the research and educational capabilities of this institution.***